CN102423784A - Device and method for expanding diameter of shape memory alloy pipe joint based on elastic medium - Google Patents
Device and method for expanding diameter of shape memory alloy pipe joint based on elastic medium Download PDFInfo
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- CN102423784A CN102423784A CN2011103497826A CN201110349782A CN102423784A CN 102423784 A CN102423784 A CN 102423784A CN 2011103497826 A CN2011103497826 A CN 2011103497826A CN 201110349782 A CN201110349782 A CN 201110349782A CN 102423784 A CN102423784 A CN 102423784A
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- pipe joint
- seaming chuck
- backing plate
- down head
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Abstract
The invention aims at providing a device and a method for expanding the diameter of a shaft memory alloy pipe joint based on an elastic medium. The device comprises a padding plate, a fixing plate, an upper pressure head, a lower pressure head, a spring, an elastic rod, an elastic ring and a punching head, wherein the upper pressure head is mounted on the lower pressure head, one end of the elastic rod is mounted in the lower pressure head, the other end of the elastic rod is mounted in the upper pressure head, the elastic ring is sleeved on the elastic rod, the fixing plate is connected with the padding plate, the upper pressure head is connected with the fixing plate and the padding plate through a bolt, the spring is mounted on the bolt, one end of the spring is connected with the fixing plate, the other end of the spring is connected with the lower pressure head, one end of the punching head is mounted in the fixing plate, and the other end of the punching head is mounted in the lower pressure head and connected with the elastic rod. The device according to the invention is simple in structure and easy to manufacture, the shape memory alloy pipe joint produced by the method according to the invention can realize integral deformation under static force, the deformation is uniform, the size precision is high, the residual stress is small and the connection performance is better.
Description
Technical field
What the present invention relates to is a kind of device and method that is used for the metal hole enlargement.
Background technology
Marmem (SMA) is a kind of new function material that grows up the beginning of the sixties in last century, has obtained in fields such as Aeronautics and Astronautics and medical treatment using widely.This material has SME, promptly after plastic deformation under a certain low-temperature condition, is heated a certain temperature again, and material can return to the state before the distortion again.Marmem pipe joint is exactly the SME that utilizes this alloy; Elder generation carries out the hole enlargement distortion at low temperatures with the pipe joint that internal diameter size is slightly less than external diameter of pipe to be connected; Make the external diameter of its internal diameter greater than the pipe that is attached thereto; Such two parts just are easy to be assembled together under this low-temperature condition; And then the joint integral body that assembles is heated to a certain temperature, make the size before the internal diameter size of marmem pipe joint returns to distortion, thereby two parts are closely connected together through restraining force.Pipe joint is one of the most ripe application of marmem, especially in the hydraulic air pipe-line system, uses the most extensive.All kinds of pipe joints of marmem manufacturing have the reliability height, seepage be difficult for to take place, simple in structure, easy for installation and save advantage such as assembly space.It is reported that existing 1,500,000 marmem pipe joints are applied to oil accident together not occur in the oil pressure pipeline of the various aircraft of the U.S..The U.S. has stipulated all must use marmem in all type aircraft fluid pressure lines.
But the hole enlargement of marmem pipe joint at present all is to adopt the tapered punch of rigidity to pass in manage to realize hole enlargement; Owing to contact with the inwall of pipe is local all the time when tapered punch passes in the pipe; Make that pipe is not that bulk deformation takes place in the hole enlargement process; Thereby the pipe joint that comes out of this explained hereafter is inner can have very big residual stress, and these residual stress not only can influence the dimensional accuracy of pipe joint, even also may exist in the shape recovery process after assembling; This can make the anti-stress corrosion performance of pipe joint descend, thereby reduces its fatigue life.In addition, when the shape memory pipe joint being carried out machinery expanding, cause the local plastic deformation or the scuffing of pipe joint inner surface easily, thereby can influence the SME and the fastening force of marmem pipe joint with tapered punch.
Summary of the invention
The object of the present invention is to provide and can on ordinary press, use, and marmem pipe joint expander and the method based on elastic fluid that distortion is even, residual stress is little and dimensional accuracy is high that can be shaped expeditiously.
The objective of the invention is to realize like this:
The present invention is based on the marmem pipe joint expander of elastic fluid, it is characterized in that: comprise backing plate, fixed head, seaming chuck, push-down head, spring, flexible rod, elastic ring, drift, seaming chuck is installed on the push-down head; Flexible rod one end is installed in the push-down head, and the flexible rod other end is installed in the seaming chuck, and elastic ring is enclosed within on the flexible rod; Fixed head links to each other with backing plate, and seaming chuck connects fixed head and backing plate, mounting spring on the bolt through bolt; One end of spring connects fixed head; The other end of spring connects push-down head, and an end of drift is installed in the fixed head, and the other end of drift is installed in the push-down head and with flexible rod and links to each other.
The present invention is based on the marmem pipe joint diameter enlarging method of elastic fluid, it is characterized in that:
(1) adopt the marmem pipe joint expander based on elastic fluid to carry out hole enlargement, described marmem pipe joint expander based on elastic fluid comprises backing plate, fixed head, seaming chuck, push-down head, spring, flexible rod, elastic ring, drift, and seaming chuck is installed on the push-down head; Flexible rod one end is installed in the push-down head; The flexible rod other end is installed in the seaming chuck, and elastic ring is enclosed within on the flexible rod, and fixed head links to each other with backing plate; Seaming chuck connects fixed head and backing plate through bolt; Mounting spring on the bolt, an end of spring connects fixed head, and the other end of spring connects push-down head; One end of drift is installed in the fixed head, and the other end of drift is installed in the push-down head and with flexible rod and links to each other; At first will be placed on based on the marmem pipe joint expander of elastic fluid on the workbench of forcing press; To push down the flange of push-down head behind the good center with pressing plate, again push-down head is fixed on the workbench, start forcing press its top shoe is displaced downwardly to after backing plate contacts; Push down the flange of backing plate again with pressing plate; And the backing plate mould is fixed on the forcing press top shoe, start forcing press and make on the top shoe and move,, upper and lower two-part space of opening stops to move on the slide block when enough putting into workpiece;
(2) the marmem pipe base is enclosed within assembly on elastic ring; The lower end of marmem pipe base is contacted with the face of push-down head, starts forcing press then backing plate is moved downward, when seaming chuck with after the marmem pipe base contacts; Owing to the inhibition of marmem pipe base stops to move; This moment, seaming chuck was pushed down the upper end of elastic ring and marmem pipe base under the elastic force effect of spring, along with moving down of drift along with the continuation of backing plate is descending; Local radially bulging is taking place with the contacted part of elastic ring in flexible rod; Thereby drive elastic ring radially bulging takes place therewith, this radial load can pass to the marmem pipe base that is enclosed within the elastic ring outside again, makes it that whole hole enlargement bulging take place;
(3) open backing plate, push-down head, make it get back to the preceding position of piece installing, flexible rod, elastic ring are got back to the state before being out of shape after external force is removed at this moment, with the workpiece taking-up completion hole enlargement that is shaped good.
The present invention can also comprise:
1, has flange on the described backing plate, have flange on the push-down head.
2, described bolt has four, and four holes that are used for construction bolt are set on the backing plate.
3, the contact-making surface of seaming chuck and the marmem that is used to process is the inclined-plane.
4, the outer shroud inwall of the stile of described push-down head and seaming chuck adopts and is slidingly matched.
Advantage of the present invention is:
1. do not need special-purpose experimental facilities, on common single action press, just can realize the two functions of pressing of single action, the hole enlargement of accomplishing marmem pipe joint is shaped.
2. apparatus structure is simple, is easy to make, and only needs a covering device, changes polyamine fat rubber ring, and the hole enlargement that just can accomplish the different-diameter marmem pipe joint is shaped, so highly versatile.
3. this device is easy to use, reliable, and cost is low, and high efficiency.
4. marmem pipe joint bulk deformation under static(al) of producing with this device, distortion is even, and dimensional accuracy is high, and residual stress is little, and switching performance is better.
Description of drawings
Fig. 1 is a structural representation of the present invention;
Fig. 2 touches sketch map on of the present invention;
Fig. 3 is an elastic device structure chart of the present invention;
Fig. 4 is a counterdie structure chart of the present invention.
The specific embodiment
For example the present invention is done description in more detail below in conjunction with accompanying drawing:
In conjunction with Fig. 1～4, the present invention is made up of patrix, elastic device and counterdie three parts, respectively like Fig. 2～shown in Figure 4.
Part of the upper die (Fig. 2) is made up of backing plate 1, fixed head 2, spring 3, seaming chuck 8, drift 9, ladder bolt 10 and set bolt 11.Have flange on the backing plate 1; Can directly link to each other with the top shoe of forcing press; Also have 4 stepped holes on it, the embedding of 4 ladder bolts 10 is adopted matched in clearance between ladder bolt 10 and the backing plate 1 when being used for the device assembling; The light face portion of ladder bolt is passed freely through, and backing plate 1 following also has 4 screwed holes, being screwed into of 4 set bolts when being used for fixed head 2 with drift 9 assemblings; The embedding that drift 9 was topped bar when the shoulder hole that the fixed head center is offered was used to assemble; 4 stepped holes of periphery are used for fixing the embedding of bolt 11; 4 peripheral through holes are used for passing of 4 ladder bolts 10; Adopt matched in clearance between these holes and the bolt, ladder bolt 10 is free to slide therebetween; The light face portion of 4 ladder bolts 10 is with 4 springs respectively, and screw thread one end and seaming chuck 8 link; Seaming chuck 8 centers also have a through hole, and adopt between the drift 9 and be slidingly matched, and seaming chuck 8 should adopt the inclined-plane with the contact-making surface of marmem pipe base 7 in addition, and can make its and contacting of workpiece is that line contacts, thus the friction when reducing hole enlargement.Such structure can realize the two functions of pressing of single action when patrix is worked.
Elastic device (Fig. 3) is made up of polyamine fat rubber bar 4 and polyamine fat rubber ring 5.Can directly be exerted pressure to rubber bar 4 ends by drift 9 during device work makes it produce local bulging; And the radial load that produces passed to rubber ring 5; And then make it produce whole radially bulging, by rubber ring 5 uniform radial load is passed to marmem pipe base 7 again and make it produce uniform integral expansion.
(Fig. 4) has only push-down head 6 in the part of the lower die.The latter half of push-down head 6 has flange, can directly be fixed on the workbench of forcing press, and its center has a blind hole, is used for the location of elastic device.The outer shroud inwall of seaming chuck 8 adopts and is slidingly matched in stile of giving prominence on it and the patrix, play the guiding role, and package unit is unlikely because of producing eccentricity issues when work influences the dimensional accuracy of part.
Method of the present invention implements to be divided into three phases, i.e. preparatory stage, hole enlargement stage and discharging stage.
Preparatory stage: at first the package unit that lumps together is placed on the workbench of forcing press,, with bolt counterdie is fixed on the workbench again to push down the flange of counterdie behind the good center with pressing plate.Start forcing press its top shoe is displaced downwardly to after upper die plate contacts, push down the flange of patrix again with pressing plate, and patrix is fixed on the forcing press top shoe with bolt.Start forcing press and make on the top shoe and move, upper and lower mould is opened, when workpiece is enough put in the space of opening of upper and lower mould, stop to move on the slide block.
The hole enlargement stage: marmem pipe base 7 is enclosed within on the elastic device of assembly in counterdie, the lower end of marmem pipe base 7 is contacted with the conical surface of counterdie, start forcing press then patrix is moved downward.When seaming chuck 8 with after marmem pipe base 7 contacts; Owing to the inhibition of marmem pipe base 7 stops to move; This moment is along with the continuation of patrix is descending; Seaming chuck 8 can be pushed down the upper end of rubber ring 5 and marmem pipe base 7 under the elastic force effect of 4 springs 3, is preventing can not press too deadly and the obstruction hole enlargement again when them from deforming vertically to pipe.Like this; Along with moving down of drift; Radially bulging just only can therewith take place thereby drive rubber ring 5 with rubber ring 5 contacted parts local radially bulging taking place in rubber bar 4, and this radial load can pass to the marmem pipe base 7 that is enclosed within rubber ring 5 outsides again; Make it that whole hole enlargement bulging take place, concrete hole enlargement size can be controlled through the ram travel of regulating forcing press.
The discharging stage: hole enlargement is opened upper and lower mould after finishing, and makes it get back to the preceding position of piece installing, and this moment, elastic device was removed the state the back can be got back to distortion again because of the elastic return effect before in external force, at this moment just can successfully the workpiece well that is shaped be taken out.
So just accomplished the hole enlargement process of a marmem pipe joint.
Claims (10)
1. based on the marmem pipe joint expander of elastic fluid, it is characterized in that: comprise backing plate, fixed head, seaming chuck, push-down head, spring, flexible rod, elastic ring, drift, seaming chuck is installed on the push-down head; Flexible rod one end is installed in the push-down head, and the flexible rod other end is installed in the seaming chuck, and elastic ring is enclosed within on the flexible rod; Fixed head links to each other with backing plate, and seaming chuck connects fixed head and backing plate, mounting spring on the bolt through bolt; One end of spring connects fixed head; The other end of spring connects push-down head, and an end of drift is installed in the fixed head, and the other end of drift is installed in the push-down head and with flexible rod and links to each other.
2. the marmem pipe joint expander based on elastic fluid according to claim 1 is characterized in that: have flange on the described backing plate, have flange on the push-down head.
3. the marmem pipe joint expander based on elastic fluid according to claim 1 and 2, it is characterized in that: described bolt has four, and four holes that are used for construction bolt are set on the backing plate.
4. the marmem pipe joint expander based on elastic fluid according to claim 1 and 2 is characterized in that: seaming chuck is the inclined-plane with the contact-making surface of the marmem that is used to process.
5. the marmem pipe joint expander based on elastic fluid according to claim 3 is characterized in that: seaming chuck is the inclined-plane with the contact-making surface of the marmem that is used to process.
6. the marmem pipe joint expander based on elastic fluid according to claim 1 and 2 is characterized in that: the outer shroud inwall of the stile of described push-down head and seaming chuck adopts and is slidingly matched.
7. the marmem pipe joint expander based on elastic fluid according to claim 3 is characterized in that: the outer shroud inwall of the stile of described push-down head and seaming chuck adopts and is slidingly matched.
8. the marmem pipe joint expander based on elastic fluid according to claim 4 is characterized in that: the outer shroud inwall of the stile of described push-down head and seaming chuck adopts and is slidingly matched.
9. the marmem pipe joint expander based on elastic fluid according to claim 5 is characterized in that: the outer shroud inwall of the stile of described push-down head and seaming chuck adopts and is slidingly matched.
10. based on the marmem pipe joint diameter enlarging method of elastic fluid, it is characterized in that:
(1) adopt the marmem pipe joint expander based on elastic fluid to carry out hole enlargement, described marmem pipe joint expander based on elastic fluid comprises backing plate, fixed head, seaming chuck, push-down head, spring, flexible rod, elastic ring, drift, and seaming chuck is installed on the push-down head; Flexible rod one end is installed in the push-down head; The flexible rod other end is installed in the seaming chuck, and elastic ring is enclosed within on the flexible rod, and fixed head links to each other with backing plate; Seaming chuck connects fixed head and backing plate through bolt; Mounting spring on the bolt, an end of spring connects fixed head, and the other end of spring connects push-down head; One end of drift is installed in the fixed head, and the other end of drift is installed in the push-down head and with flexible rod and links to each other; At first will be placed on based on the marmem pipe joint expander of elastic fluid on the workbench of forcing press; To push down the flange of push-down head behind the good center with pressing plate, again push-down head is fixed on the workbench, start forcing press its top shoe is displaced downwardly to after backing plate contacts; Push down the flange of backing plate again with pressing plate; And the backing plate mould is fixed on the forcing press top shoe, start forcing press and make on the top shoe and move,, upper and lower two-part space of opening stops to move on the slide block when enough putting into workpiece;
(2) the marmem pipe base is enclosed within assembly on elastic ring; The lower end of marmem pipe base is contacted with the face of push-down head, starts forcing press then backing plate is moved downward, when seaming chuck with after the marmem pipe base contacts; Owing to the inhibition of marmem pipe base stops to move; This moment, seaming chuck was pushed down the upper end of elastic ring and marmem pipe base under the elastic force effect of spring, along with moving down of drift along with the continuation of backing plate is descending; Local radially bulging is taking place with the contacted part of elastic ring in flexible rod; Thereby drive elastic ring radially bulging takes place therewith, this radial load can pass to the marmem pipe base that is enclosed within the elastic ring outside again, makes it that whole hole enlargement bulging take place;
(3) open backing plate, push-down head, make it get back to the preceding position of piece installing, flexible rod, elastic ring are got back to the state before being out of shape after external force is removed at this moment, with the workpiece taking-up completion hole enlargement that is shaped good.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2011103497826A CN102423784A (en) | 2011-11-08 | 2011-11-08 | Device and method for expanding diameter of shape memory alloy pipe joint based on elastic medium |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2011103497826A CN102423784A (en) | 2011-11-08 | 2011-11-08 | Device and method for expanding diameter of shape memory alloy pipe joint based on elastic medium |
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| CN102423784A true CN102423784A (en) | 2012-04-25 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN2011103497826A Pending CN102423784A (en) | 2011-11-08 | 2011-11-08 | Device and method for expanding diameter of shape memory alloy pipe joint based on elastic medium |
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Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103063421A (en) * | 2012-12-19 | 2013-04-24 | 西安理工大学 | Automatic comprehensive detection device and detection method for inclined ring spring property |
| CN103433395A (en) * | 2013-09-03 | 2013-12-11 | 西安胜智航空科技有限公司 | Expanding device for shape memory alloy pipe joint |
| CN107206464A (en) * | 2015-02-06 | 2017-09-26 | 株式会社神户制钢所 | The joint method of component |
| CN109772969A (en) * | 2019-02-25 | 2019-05-21 | 哈尔滨工业大学（威海） | A kind of metal bellows forming device and method |
| CN115647226A (en) * | 2022-12-03 | 2023-01-31 | 苏州市越海拉伸机械有限公司 | Reaming device and reaming process for thin-walled tube |
| CN116532563A (en) * | 2023-07-06 | 2023-08-04 | 太原理工大学 | Spinning and expanding integrated device and method for shape memory alloy pipe joint with inner ribs |
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| US20110226034A1 (en) * | 2010-03-19 | 2011-09-22 | O.N. Industries, Ltd. | Pipe expanding apparatus of thin wall stainless steel pipe |
| CN202291094U (en) * | 2011-11-08 | 2012-07-04 | 哈尔滨工程大学 | Shape memory alloy pipe joint expanding device based on elastic medium |
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Cited By (10)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103063421A (en) * | 2012-12-19 | 2013-04-24 | 西安理工大学 | Automatic comprehensive detection device and detection method for inclined ring spring property |
| CN103063421B (en) * | 2012-12-19 | 2015-03-25 | 西安理工大学 | Automatic comprehensive detection device and detection method for inclined ring spring property |
| CN103433395A (en) * | 2013-09-03 | 2013-12-11 | 西安胜智航空科技有限公司 | Expanding device for shape memory alloy pipe joint |
| CN107206464A (en) * | 2015-02-06 | 2017-09-26 | 株式会社神户制钢所 | The joint method of component |
| CN109772969A (en) * | 2019-02-25 | 2019-05-21 | 哈尔滨工业大学（威海） | A kind of metal bellows forming device and method |
| CN109772969B (en) * | 2019-02-25 | 2020-09-18 | 哈尔滨工业大学（威海） | Metal corrugated pipe forming device and method |
| CN115647226A (en) * | 2022-12-03 | 2023-01-31 | 苏州市越海拉伸机械有限公司 | Reaming device and reaming process for thin-walled tube |
| CN115647226B (en) * | 2022-12-03 | 2024-03-26 | 苏州市越海拉伸机械有限公司 | Reaming device and reaming process for thin-wall pipe |
| CN116532563A (en) * | 2023-07-06 | 2023-08-04 | 太原理工大学 | Spinning and expanding integrated device and method for shape memory alloy pipe joint with inner ribs |
| CN116532563B (en) * | 2023-07-06 | 2023-08-29 | 太原理工大学 | Spinning and expanding integrated device and method for shape memory alloy pipe joint with inner ribs |
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Application publication date: 20120425 |